CVE-2026-106462

Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback

MEDIUM
6.4
CVSS Score
Published: October 6, 2026 at 08:30 PM UTC
Updated: October 22, 2026 at 06:53 PM UTC
14 products affected across 2 vendorsBackstageBackstage /plugin Scaffolder Backendbackstage\/plugin-scaffolder-backend-module-github

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Backstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.

References (3)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/backstage/backstage/security/advisories/GHSA-29gx-h2m3-xw44
x_refsource_MISCPatchRelease Notes
Source: cverecord
https://github.com/backstage/backstage/releases/tag/v1.54.6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-441CWE-863

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